Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c14ec33ebba1740…

MALICIOUS

PDF

51.8 KB Created: 2020-08-09 14:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce36554fc987afb9a94efc783caa4554 SHA-1: 96f2b13705b9920871833ddd9f9aa26f41a3df02 SHA-256: 0c14ec33ebba1740dc30e12ed9591b33b25b8aa3189d5dbf8fa89bf24155bd48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for malicious redirector links, specifically pointing to 'ttraff.ru'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=berserk+volume+39+pdf
    • http://files.octaviaharris.com/uploads/1/3/0/8/130814907/jedufurafilufuge.pdf
    • http://nasagid.monarayfineart.com/uploads/1/3/0/7/130775129/6897d.pdf
    • http://files.nstcricelake.org/uploads/1/3/1/8/131857565/fuxozefifidokej.pdf
    • http://files.keepmaryoutofthekitchen.com/uploads/1/3/0/9/130969298/621ef3a12.pdf
    • http://rekomora.abbydecoratingden.com/uploads/1/3/0/8/130814297/57d811.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/10687740685.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/index_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/1808507677.pdf
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/wupefebazevoviburowipaben.pdf
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/kizuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/kazanutomurikod.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/foruzuwefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/52040472201.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/4348914318.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/zuzefisegotikejokaxonet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/69941781725.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cb.bin
b6568a03639cc0c5ace3dfbc3e69b7aedfcfd46c042ff66e7479098f4efe516b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 3616 bytes
font_01_sfnt_off000071ac.bin
0a24b7d3a4f38a50729ca112948990b166e4b25a9347fc30f6c1abbea4bd243c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AC 5116 bytes
font_02_sfnt_off00008316.bin
fec5956f031e74912f29261342f0913dce13b5d3d44a03ad7078c23617aaf835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 15088 bytes
font_03_sfnt_off0000b1ce.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CE 4324 bytes

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